Improvement in harvesters



@atent- @twine WILLIAM A. SI-IARPE, OF SYRACUSE, NEW YORK.

Letters Patent No. 93,013, lated July 27, 1869;.` .antedatetl July 16, 1869.

IMPROVEMENT IN' HARVESTERS.

'lhe Schedule referred to in these Letters Patent and making partof the same.

Be it known that I, lVILLIMI A. SHARPE, of Syracuse, in the county of Onondaga, and State of New York, have invented anlinproved Caster-Wheel for Itcaping and llIowing-Machines; and I do hereby declare and ascertain my said invention as follows, referring to thev accompanying drawing in illustration thereof, in which- Figure 1 is'an elevation o f the wheel and its attachments on they inside, n'ext the platform.

Figure 2 is a section through the axisof the wheel,

at right angles to fig. 1. Figure 3 represents the levelling and draughtplate'.

The same letters of reference are used to designate like parts in all the gurcs.

The wheel A has its tread projecting from one side ot the plate or spokes thereof, and the hub or axis also projects on the saine side.

A box, B, ts on to this shortaxis, in which the latter turns. To the inner end of the axis, just outside of box B, a small spur-wheel or pinion, F, is at'- ixed, so as to turn with the caster-wheel A.

The box B is fitted to slide in an oblong rectangular loop or link, O, which is pivoted at its centre to arms projecting ti'om plate I), which is attached to plate E, so as to be levelled b v means of a pivot-bolt below and a set-bolt in a slot above, as clearly represented in iig. 3.

'lfheplate E is firmlr affixed to the platform ot the rea )er and set at the )ro )er heiuht in the usual wav.

'Ihe box B, as will be seen at tig. 2, has but one tlanch to bear against the link G, the weh ofthe wheel serving for the other.

On the face ot' the link C are pivoted one or more racks G. (The preferable way is to form a single rack, extending from end to end ot' the link, and attaching it by pins to the link, the pins passing through vertically oblong holes, so as to allow the rack to rise and clear the teeth of the pinion-wheel F, that gear into it.) Several ofthe teeth are bevelled oft at each end,

as clearly seen at Iig. 1, so that when the pinion is at the end of the rack, and continues tuming in that direction, it will be freed from the said rack G, but when the motion of the pinion is reversed, the teeth catch upon the escapement-teeth ofthe rack, and the box B is driven to the opposite end of the link G.

In this way the box B, and consequently the axis ofv the wheel A, are kept at the rea-r end of the link whichever way it progres; es and the link being pivoted at its centre, the wheel A is made to track whatever curve the link moves in.

It is obvious, if two racks are `used, extending from the centre to either end, theymnst be pivoted at the centre, and the single rack can be, but I prefer pivoting at the ends, as above described. A

Springs H can be used to insure the falling of the rack, if t'ound necessary.

This slide-box and pinion, with escapement-raek, may be found useful in` other machinery.

Having thus fully set forth my improved casterwheel,

What I claim therein as new, and for which I'desire to secure Letters Patent, is l 1. The combination of the box B and link C, substantially as and for the purpose set forth.

2. Also, in combination with the box and link, the rack or racks Gand pinion-wheel F, substantially as and forthe purposes mentioned.

3. Also, pivoting the link O, and swivelling the same, substantially as herein specified.

4. Also, the entire combination of parts forming a casterfwheel for a reaping-machine, consisting of the wheel A and the box B, link C, adjustable pivotingplate D, rack G, and pinion F, as and for the purposes described.

lV. A. SHARPE. Witnesses WM. A. Swnn'r, WM. W. S'T. J ons. 

